1265500160 has 72 divisors (see below), whose sum is σ = 3038761656. Its totient is φ = 505937920.

The previous prime is 1265500151. The next prime is 1265500177. The reversal of 1265500160 is 610055621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 654395 + ... + 656325.

It is an arithmetic number, because the mean of its divisors is an integer number (42205023).

Almost surely, 2^1265500160 is an apocalyptic number.

1265500160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1265500160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1519380828).

1265500160 is an abundant number, since it is smaller than the sum of its proper divisors (1773261496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1265500160 is an frugal number, since it uses more digits than its factorization.

1265500160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1970 (or 1938 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 1265500160 is about 35573.8690614333. The cubic root of 1265500160 is about 1081.6516110428.

Adding to 1265500160 its reverse (610055621), we get a palindrome (1875555781).

The spelling of 1265500160 in words is "one billion, two hundred sixty-five million, five hundred thousand, one hundred sixty".